Abstract: The resource utilization of rural wastewater is a critical component in constructing green circular agricultural systems and implementing rural revitalization strategies. This study, based on the comprehensive planning and implementation case of Sigang Village in Shigang Town, Tongzhou District, Nantong City, Jiangsu Province, analyzes the current adaptability conflicts between rural wastewater treatment and farmland irrigation systems regarding water quality standards, production-demand timing, and engineering mechanisms. A 'spatiotemporal coordination + supply-demand coordination' planning framework is proposed to optimize the systemic synergy of wastewater generation, treatment, and reuse processes. Empirical data comparative analysis demonstrates that this strategy achieves significant improvements in wastewater reuse rate, operational cost reduction, nutrient utilization efficiency, and ecological safety. The findings indicate that enhancing the adaptability between planning systems and engineering technologies can empower rural green infrastructure with greater resilience, offering actionable planning pathways for sustainable rural development.